From the New York Times:

QUOTE
CROTON-ON-HUDSON, N.Y., Oct. 16 - Tim Walton was on a busman's holiday of sorts on Saturday.

Mr. Walton had brought his 12-year-old son, also named Tim, and his 7-year-old daughter, Sarah, to an open house at the Metro-North Railroad shop, and was showing them the fine points of operating a train, which is what he does for a living.

The full story is here.